style.css

/* Base Styles */
:root {
    --primary-color: #3572A5;
    --secondary-color: #FFD43B;
    --background-color: #f5f5f5;
    --text-color: #282c34;
}

[data-theme="dark"] {
    --primary-color: #FFD43B;
    --secondary-color: #3572A5;
    --background-color: #282c34;
    --text-color: #f5f5f5;
}

* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    font-family: sans-serif;
}

html, body {
    height: 100%;
    width: 100%;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    transition: background-color 0.3s, color 0.3s;
}

#container {
    width: 100%;
    max-width: 640px;
    margin: 1rem;
    border: 2px dashed var(--primary-color);
    border-radius: 0.75rem;
    padding: 16px;
    background-color: var(--secondary-color);
    color: var(--text-color);
    text-align: center;
    transition: background-color 0.3s, border-color 0.3s;
}

textarea {
    width: 100%;
    height: 180px;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid var(--primary-color);
    border-radius: 5px;
    background-color: #ffffff;
    font-family: 'Courier New', Courier, monospace;
    font-size: 16px;
    resize: vertical;
}

button {
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

#results {
    width: 100%;
    max-width: 640px;
    background-color: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px;
    margin-top: 10px;
    overflow: auto;
    color: #333;
}

/* Toggle for Light/Dark Mode */
#toggle-theme {
    margin: 10px;
    cursor: pointer;
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 8px;
    }

    #container, #results {
        width: 100%;
        padding: 12px;
        font-size: 16px;
    }

    textarea {
        height: 120px;
    }

    button {
        width: 100%;
    }
}